CN100403850C - Circular polarized wave positioning method applicable to TD-SCDMA network - Google Patents
Circular polarized wave positioning method applicable to TD-SCDMA network Download PDFInfo
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- CN100403850C CN100403850C CNB2006100543944A CN200610054394A CN100403850C CN 100403850 C CN100403850 C CN 100403850C CN B2006100543944 A CNB2006100543944 A CN B2006100543944A CN 200610054394 A CN200610054394 A CN 200610054394A CN 100403850 C CN100403850 C CN 100403850C
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Abstract
The invention relates to an indoor positioning method based on electromagnetic wave polarization technique, wherein the invention arranges some emitters indoor, to radiate polarized electromagnetic wave, mobile phone or other mobile terminals via polarized antennas can receive the direct signal but shield the energy of reflective signals, to restrain the condition effect; via the energy of direct signals, it can build signal strength database, when it can receive three emitters, it can accurately position indoor. The inventive system can be used in indoor position service and based on other wireless communication networks to realize seamless position, combined with outdoor position technique.
Description
Technical field
The present invention relates to wireless communication technology field, especially utilize the wireless location technology of polarization of ele character.
Background technology
Present widely used GPS location technology is indoor too weak and can't use because do not receive satellite-signal or satellite-signal, and technology such as the CELL-ID that indoor positioning can be adopted, TDOA are but because of the too low demand that can not satisfy the user of positioning accuracy.When realizing based on the localization method of WLAN (wireless local area network) a large amount of third party devices need be installed, the cost of installation and maintenance is all very expensive, and this technological accumulation and inheritance influence is bigger, and systematic function is very unstable, has a strong impact on the further raising of positioning accuracy.
Summary of the invention
The present invention proposes a kind of circularly polarised wave indoor orientation method: at the launch point of indoor laying emission circularly polarised wave, poliarizing antenna receives the signal of launch point, utilizes its signal strength signal intensity to position.Thereby having reduced the influence of environmental change factor, the cost of simultaneity factor installation and maintenance cost is little and position stability is high.
Technical scheme of the present invention is: the integrated spatial database of location server, signal strength data storehouse, communication function module, computing module and data feedback module; In indoor laying emission circularly polarised wave direction is the launch point of forward, launch point sends circularly polarised wave, be installed in portable terminal or with auxiliary equipment that portable terminal links to each other on poliarizing antenna reception circularly polarised wave when the even number secondary reflection signal strength signal intensity and it is sent into the signal strength data storehouse; System is divided into some grids to the interior space to the signal strength signal intensity initialization according to required positioning accuracy, measures the signal strength signal intensity of the corresponding launch point of grid element center, with its input signal strength database; When portable terminal received the signal of 3 or the reflection of more launch point, user terminal sent Location Request to LBS; The LBS indicating user terminal sends to the circularly polarised wave of 3 launch points and datum mark thereof in the location server at least; The circularly polarised wave signal strength signal intensity that location server utilizes ground reference point is carried out the circularly polarised wave signal of launch point after the capability correction, utilizes method such as maximum likelihood coupling to inquire about in the signal strength data storehouse and obtains several groups of approximate matched datas; Computing module calls matched data and calculates position information of user's terminal, obtains positioning result, and the data feedback module feeds back to the user with the result.When using this positioning service in other communication networks (as TD-SCDMA), the user sends Location Request on auxiliary equipment; The information of launch point and datum mark is transferred to portable terminal by auxiliary equipment, and by core net above-mentioned information is sent to location server.Poliarizing antenna can be installed on the portable terminal or with auxiliary equipment that the mobile terminal links to each other on.
The invention has the beneficial effects as follows: utilize the circular polarization navigation system, realize the accurate location of indoor user terminal, system is convenient for installation and maintenance, positioning stablity, thus provide the accurate data source for various location-based services.
Description of drawings
Service system structure when Fig. 1 independently uses the polarized wave indoor positioning
Fig. 2 independently uses the positioning flow figure of polarized wave location
Fig. 3 uses the positioning flow figure of polarized wave location in the TD-SCDMA network
Embodiment
Service system structure when as shown in Figure 1, having described independent use polarized wave indoor locating system.Launch point at indoor laying emission circularly polarised wave, and datum mark, in independent use native system, launch point emission circularly polarised wave, communications such as bluetooth or WLAN (wireless local area network) are adopted in the mobile terminal, the electromagnetic wave of control launch point emission different frequency, by distinguishing electromagnetic different frequency, perhaps the modes such as code division multiplexing of launch point emission simple signal are distinguished each launch point; The poliarizing antenna of portable terminal equipment and launch point coupling also guarantees can receive the signal that at least 3 launch points are launched in indoor any position, while portable terminal integrated service LBS (Location Based Service) and communication function based on the location; Datum mark equipment poliarizing antenna is the integrated communicaton function simultaneously; Integrated spatial database of location server and signal strength data storehouse, integrated communicaton functional module, computing module and data feedback module thereof simultaneously.
When in other network environment, using the service of polarized wave indoor positioning, during as use native system in communication networks such as GSM, CDMA, TD-SCDMA, LAN, the configuration the when basic demand of launch point and datum mark is used the polarized wave indoor positioning with independence is the same; Owing to use the restriction of network, may only have communication function such as mobile terminal in the TD-SCDMA network, this moment, poliarizing antenna and LBS application program can be integrated on the auxiliary equipment, can intercom mutually by modes such as RS-232 between mobile terminal and the auxiliary equipment; Location server can be placed in the node in the network, conveniently communicates with the mobile terminal.
Localization process flow chart when as shown in Figure 2, having described independent use native system and carry out indoor positioning.At first be to send positioning request information to LBS by user terminal, positioning request information comprises quality of service requirement such as response time or the like; LBS indication mobile terminal sends to the information of launch point and datum mark thereof in the location server, and these information comprise the identifying information of launch point and datum mark and signal strength information thereof or the like; After location server is received above-mentioned information, through capability correction, utilize the identifying information of launch point and the signal strength information after the correction in database, to search several groups of data of mating most then, computing module utilizes these several groups of data by calculating last positioning result, finally feeds back to LBS and provide to be shown to the user.
As shown in Figure 3, the flow chart that uses the polarized wave indoor positioning in other networks (as TD-SCDMA) has been described.The user sends the LBS of Location Request to auxiliary equipment; Poliarizing antenna on the auxiliary equipment obtains information such as the identifying information of launch point and datum mark thereof and signal strength signal intensity, and by RS-232, transmission means such as wireless with these message transmission to portable terminal; Portable terminal is sent to the base station by the Uu interface with information; The base station is sent to CN (Core Network core net) by the Iu interface with information; Location server can be placed on of CN above the node, computing module in the enable position server after overmatching and calculating, obtains location information of mobile terminal, and the spatial data in room, place or the like feeds back to auxiliary equipment, and the LBS of auxiliary equipment is located the result and feeds back to the user.
During initializing signal intensity indoor environment is divided into little grid one by one, the size of grid can be determined according to the required accuracy in location; The data of the signal strength signal intensity of the launch point of the center correspondence of each grid are added in the spatial database.
It is as shown in table 1 below that each grid data is stored in the information of database:
Table 1 database storage mode
| Grid ID | The corresponding spatial data of grid | Launch point ID+ respective signal intensity | Launch point ID+ respective signal intensity | Launch point ID+ respective signal intensity |
| 001 | …… | 001 -33dBm | 002 -52dBm | 003 -44dBm |
| 002 | …… | 001 -28dBm | 002 -39dBm | 003 -45dBm |
| …… | …… | …… | …… | …… |
When network architecture is arranged and after the signal initialization survey finished, according to positioning flow mentioned above, the signal strength signal intensity of 3 launch points that the mobile terminal will measure and the signal strength signal intensity of datum mark thereof were input in the location server at least; The ratio of the signal strength signal intensity of the signal strength signal intensity of datum mark and real-time datum mark when calculating initialization multiply by the signal strength values of 3 real-time launch points with this ratio, promptly obtains the signal strength signal intensity of the launch point proofreaied and correct; Utilize methods such as maximum likelihood coupling in database, to find afterwards again and proofread and correct after the signal strength signal intensity of the launch point several groups of data of mating most, these data are input to computing module, computing module is according to the degree of approximation of these several groups of data and actual measurement data, distribute to the corresponding weights of these several groups of data, calculate the weighted average of the position coordinates of these several groups of data correspondences then, with it as the position coordinates of waiting to ask portable terminal, and export the position coordinates of this portable terminal, feed back to the user simultaneously.
The present invention adopts circular polarized wave positioning method, for indoor mobile phone users provides accurate localization, thereby provides the accurate data source for various location-based services.This system can use separately for the user who only needs the indoor positioning service, also can realize real seamless location in conjunction with outdoor location technology based on other cordless communication network.Can be applied in department store, supermarket, parking lot or the like occasion.
Claims (4)
1. indoor terminal localization method based on circularly polarised wave, the integrated spatial database of location server, signal strength data storehouse, communication function module, computing module and data feedback module is characterized in that: at the launch point and the datum mark of indoor laying emission circularly polarised wave; Launch point sends circularly polarised wave; Be installed in mobile subscriber terminal or with auxiliary equipment that mobile subscriber terminal links to each other on poliarizing antenna receive circularly polarised wave when the even number secondary reflection signal strength signal intensity and it is sent into the signal strength data storehouse; System is to the signal strength signal intensity initialization; Mobile subscriber terminal sends Location Request to LBS; LBS indication mobile subscriber terminal sends to the circularly polarised wave of 3 launch points and datum mark thereof in the location server at least; Location server is proofreaied and correct the circularly polarised wave signal power of launch point according to the circularly polarised wave signal strength signal intensity of datum mark, and request signal intensity data storehouse, seeks matched data; Matched data in the computing module call signal intensity data storehouse is calculated the mobile subscriber terminal positional information; The data feedback module feeds back to mobile subscriber terminal with result of calculation.
2. indoor terminal localization method according to claim 1 is characterized in that: launch point emission circular polarization wave line of propagation is a forward.
3. indoor terminal localization method according to claim 1, it is characterized in that: the signal strength signal intensity initialization procedure comprises: the interior space is divided into some grids, measure the signal strength signal intensity of the corresponding launch point of grid element center, and it is added in the signal strength data storehouse.
4. indoor terminal localization method according to claim 3, it is characterized in that: sizing grid is divided according to positioning accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100543944A CN100403850C (en) | 2006-06-27 | 2006-06-27 | Circular polarized wave positioning method applicable to TD-SCDMA network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100543944A CN100403850C (en) | 2006-06-27 | 2006-06-27 | Circular polarized wave positioning method applicable to TD-SCDMA network |
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| CN1968499A CN1968499A (en) | 2007-05-23 |
| CN100403850C true CN100403850C (en) | 2008-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10849205B2 (en) | 2015-10-14 | 2020-11-24 | Current Lighting Solutions, Llc | Luminaire having a beacon and a directional antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102487478A (en) * | 2010-12-06 | 2012-06-06 | 国民技术股份有限公司 | Real-time information service system and real-time information distribution method |
| CN102487479A (en) * | 2010-12-06 | 2012-06-06 | 国民技术股份有限公司 | Real-time information service system and real-time information issuing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5903238A (en) * | 1996-09-20 | 1999-05-11 | Siemens Aktiengesellschaft | Radio station for mobile communication systems and method for the selection of a transmission means |
| WO2000069020A1 (en) * | 1996-09-09 | 2000-11-16 | Victory Industrial Corporation | Method and apparatus for improved signal reception with less multipath interference |
| CN1299468A (en) * | 1998-05-01 | 2001-06-13 | 诺瓦特尔有限公司 | Method and apparatus for characterizing multipath interference in circularly polarized signals |
| CN1576880A (en) * | 2003-06-27 | 2005-02-09 | 精工爱普生株式会社 | Radio receiver and GPS receiver |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000069020A1 (en) * | 1996-09-09 | 2000-11-16 | Victory Industrial Corporation | Method and apparatus for improved signal reception with less multipath interference |
| US5903238A (en) * | 1996-09-20 | 1999-05-11 | Siemens Aktiengesellschaft | Radio station for mobile communication systems and method for the selection of a transmission means |
| CN1299468A (en) * | 1998-05-01 | 2001-06-13 | 诺瓦特尔有限公司 | Method and apparatus for characterizing multipath interference in circularly polarized signals |
| CN1576880A (en) * | 2003-06-27 | 2005-02-09 | 精工爱普生株式会社 | Radio receiver and GPS receiver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10849205B2 (en) | 2015-10-14 | 2020-11-24 | Current Lighting Solutions, Llc | Luminaire having a beacon and a directional antenna |
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